package cn.tedu.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Scanner;

/**
 * 功能: 注册功能
 * 库名: tedu
 * 表名: userinfo[id,username,password,nickname,age]
 * 目标: 在userinfo表中插入1条表记录;
 */
public class JDBCDemo1 {
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        /*
            1.加载数据库驱动;
            2.创建数据库连接对象;
            3.创建SQL语句执行对象;
            4.执行SQL语句;
            5.断开数据库连接;
         */
        //1.加载数据库驱动
        Class.forName("com.mysql.cj.jdbc.Driver");
        //2.创建数据库连接对象: .var + 回车
        Connection connection = DriverManager.getConnection(
                "jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
                "root",
                "root"
        );
        //3.创建SQL语句执行对象
        Statement statement = connection.createStatement();
        //4.执行SQL语句
        //  接收用户输入:用户名、密码、昵称、年龄
        Scanner scanner = new Scanner(System.in);
        System.out.println("用户名:");
        String username = scanner.nextLine();
        System.out.println("密码:");
        String password = scanner.nextLine();
        System.out.println("昵称:");
        String nickname = scanner.nextLine();
        System.out.println("年龄:");
        Integer age = scanner.nextInt();
        //字符串拼接方式执行SQL, "+变量名+" ,将变量的值嵌入到SQL语句中;
        String sql = "INSERT INTO userinfo(username,password,nickname,age) VALUES('"+username+"','"+password+"','"+nickname+"',"+age+")";
        int i = statement.executeUpdate(sql);
        //5.断开数据库连接
        connection.close();
    }
}
















